DotNet Developer - IT Process Consulting & Software Development (m/f/d)

Leoni France; Hermosillo; On-site; MXN 600,000 - 900,000; Full time

Job summary

LEONI Hermosillo is seeking an experienced DotNet Developer to lead design, modernization, and enhancement of software applications. You will work with C#/.NET, modernize legacy systems, and guide migrations while leveraging AI-powered tools.

The role requires fluent English, a university degree, and at least five years in the .NET ecosystem; you will mentor teams, drive architecture reviews, and collaborate with stakeholders to deliver robust software solutions.

Qualifications

• University degree in Computer Science, Software Engineering, Information Technology, or a related field.
• Fluent English (written and spoken)
• Minimum 5 years of proven experience in: C# and the .NET ecosystem (Framework, Core, .NET 8); Maintaining, migrating, and modernizing legacy .NET applications; Building web applications (Windows Forms, ASP.NET Core, MVC, Xamarin, RESTful APIs); Object-oriented programming (OOP), SOLID principles, and design patterns; Version control systems (Git); Effective use of AI-powered coding assistants and tools.

Responsibilities

• Design, develop, and deploy scalable applications with C#/.NET.
• Modernize and maintain legacy systems, ensuring stability during migration.
• Use AI-driven tools to optimize coding, debugging, and testing.
• Lead architecture sessions and code reviews to enforce best practices.
• Mentor developers, fostering technical excellence and growth.
• Troubleshoot complex defects and performance issues.
• Contribute across the full software development lifecycle.

Skills

C#

.NET

ASP.NET Core

MVC

Xamarin

RESTful APIs

Git

AI tools

Education

University degree in Computer Science or related

Tools

Azure

Job description

DotNet Developer - IT Process Consulting & Software Development (m/f/d)

Location: Hermosillo, Mexico Type of job: Hybrid Date: new

LEONI is a global leading provider of products, solutions and services for energy and data management in the automotive industry. With around 86,000 employees in 21 countries and consolidated sales of EUR 3.9 billion in 2025 (excluding the former Automotive Cable Solutions division), we are a leading supplier of complex wiring systems and customer‑specific cable harnesses.

Since 2025, we have been part of the Luxshare Group, a global technology company headquartered in China. Together, we are shaping the future of mobility. Join us and help drive the transformation of the automotive world.

Job Description

We are seeking an experienced professional in IT Process Consulting and Software Development to lead the design, modernization, and enhancement of our software applications. The ideal candidate will have a solid background in the .NET ecosystem, with proven expertise in maintaining and upgrading legacy systems. This role requires leveraging modern technologies, including AI-powered tools, to deliver scalable, high-performance solutions. Responsibilities include mentoring team members, driving technical strategy, and collaborating with stakeholders to ensure robust and innovative software delivery.

• Design, develop, and deploy scalable applications with C#/.NET.
• Modernize and maintain legacy systems, ensuring stability during migration.
• Use AI-driven tools to optimize coding, debugging, and testing.
• Lead architecture sessions and code reviews to enforce best practices.
• Mentor developers, fostering technical excellence and growth.
• Troubleshoot complex defects and performance issues.
• Contribute across the full software development lifecycle.

Qualifications and Experience

University degree in Computer Science, Software Engineering, Information Technology, or a related field.

Fluent English (written and spoken)

Minimum 5 years of proven experience in:

• C# and the .NET ecosystem (Framework, Core, .NET 8)
• Maintaining, migrating, and modernizing legacy .NET applications
• Building web applications (Windows Forms, ASP.NET Core, MVC, Xamarin, RESTful APIs)
• Object-oriented programming (OOP), SOLID principles, and design patterns
• Version control systems (Git)
• Effective use of AI-powered coding assistants and tools

Preferred Qualifications

• Experience with cloud platforms (e.g., Azure)
• Knowledge of microservices architecture and distributed systems
• Experience with CI/CD pipelines and DevOps practices

People of all genders are always meant equally; for linguistic simplification and better readability, only the masculine form is used in the text.
LEONI processes your application data in an IT-system that is consistent across the company and uses Foreign Service providers. By sending your application, you agree to this procedure. LEONI ensures the compliance with data protection.